BIO 123 Lecture Notes - Lecture 5: Sickle-Cell Disease, Cystic Fibrosis, Pheromone
Document Summary
Sex pheromone: chemical signal that alters sexual behavior of another individual. Bolas spider attract male moths with female moth pheromone for prey. Flehmen response exposing specific pheromone cues to nasal organ. Vomeronasal organ delivers pheromone signals to brain, different pathway than olfactory signals. Male detects when a female is ready to mate, if she is the best quality. Pheromones can prevent inbreeding incest can cause problems increases chances of homozygous recessive can uncover diseases normally hidden in heterozygotes. Sickle cell anemia: single gene, causes sickling of red blood cells, severe pain, alter o2 carrying capacity, reduces lifespan. Cystic fibrosis: homozygote recessive have it altars lining of intestinal wall and makes lungs susceptible to bacteria. Squirrels learn their own scent, use as a reference for how to react to others. Armpit effected spend more time checking out potential mates than relatives. Pheromones can be used to compete for mate"s hippos.
